A drive head for controlling high-pressure and large-flow ball valves
A large-flow, valve-driven technology, applied in the direction of valve operation/release devices, valve details, valve devices, etc., can solve the problems of uneven stress on parts, prone to failure, easy to wear and seal, etc., to achieve cost savings and structure Stable and reliable, reduce the effect of meshing force
Inactive Publication Date: 2019-07-02
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology
Due to the dual forces of hydraulic oil and gear meshing, the former is prone to flexible deformation, poor strength, and is also prone to wear and further cause seal failure; the latter is due to the transmitted torque being approximately parabolic, causing uneven force on the components, so prone to failure
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Embodiment Construction
[0032] The driving head of the present invention includes a cylinder block, a rack piston, a gear shaft, a left end cover, a right end cover, a support plate, a valve drive shaft, a valve mounting seat, an upper support pad, a lower support pad, a retaining ring, a sealing ring, and an end Cover screws, support plate screws and mounting base screws.
[0033] The inner surface of the cylinder body is a smooth cylindrical surface with extremely low roughness, which realizes a dynamic seal fit with the rack piston; the lower part of the cylinder body is designed with a cylindrical through hole for the installation of the gear shaft and a sink to ensure the installation of the support pad. The upper part is designed with a matching window for the mounting of the gear shaft support plate to match the chamfering of the two sides of the window to reduce the shearing effect of the sharp edge on the sealing ring. The corresponding threaded hole is symmetrically designed on the window match...
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A drive head for controlling high-pressure, high-flow ball valves. The main purpose is to provide a hydraulic drive head, which drives the balanced frame rack piston through hydraulic oil supply to drive the gear shaft to rotate forward or reverse 90 degrees, and then controls the switch of the high-pressure and large-flow ball valve. It is characterized in that: the drive head adopts a balanced frame double-piston structure, one side of the frame is equipped with a rack, which can cooperate with the gear shaft to output torque, and the other side of the frame is used to balance the load and maintain the overall rigidity of the piston; the piston, cylinder The pressure oil input can push the piston to drive the rack to drive the gear shaft to rotate, so as to realize the output of torque and angular displacement to control the switch of the ball valve; the rack and pinion transmission mechanism and the connection between the cylinder and the piston The sealing cavity is separated to simplify the sealing structure of the rotating part of the rack and pinion. This type of drive head can be applied to the switch control of different types of high-pressure and large-flow ball valves by adjusting the size of the valve mounting seat and the valve drive shaft.
Description
Technical field [0001] The invention relates to hydraulic drive technology, in particular to a hydraulic drive head. Background technique [0002] The hydraulic drive head currently used mainly has two structures. One is the sliding support of the rack and pinion bearing bush at two points, and the linear motion of the piston is converted into the rotation of the gear output shaft by the rack and pinion mechanism; the other is the shifting fork type using the output shaft. The connecting rod converts the linear motion of the piston into the rotation of the output shaft. The former is prone to flexible deformation and poor strength due to the dual force of hydraulic oil and gear meshing, and at the same time it is easy to wear and further cause seal failure; the latter, because the transmitted torque is similar to a parabola, causes uneven forces on components, so It is easy to malfunction. Summary of the invention [0003] In order to solve the technical problems mentioned in th...
Claims
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IPC IPC(8): F16K5/06F16K31/122F16K31/54F16K37/00
CPCF16K5/0647F16K31/122F16K31/54F16K37/00
Inventor 贾光政侯永强高倩李玉玺荆冠鹏张一达
Owner NORTHEAST GASOLINEEUM UNIV